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0. R. PETRELIUS. mmwo FOR MANUFACTURING COLOR PRINTS.

APPLlCATlON F ILED DEC-2B. 1916.

Patented Nov. 4, 1919.

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OSCAR RICHARD PETRELIUS, OF STOCKHOLM, SWEDEN ASSIGNOR TO AK'IIEBOLAGET HAssEr, or STQCKHOLM, swnnniv.

METHOD FOR. MANUFACTURING- COLOR-PRINTS Specification of Letters Patent.

PatentedNov. ll, 19119,

Application filed December 26, 1916. Serial No. 138,988.

To all :whom it may concern:

Be 1t known that I, OSCAR RICHARD PE- TREIIUS, manufacturer, subject ofthe King of Sweden, residing at Riddargatan 17, Stockholm, in the Kingdom of Sweden, have invented certain new and useful Improvements in Methods for Manufacturing (electrotype or such like), by introducing a moist print layer between the paper and one of theother two parts and by applying a great pressure to the paper or the like. Suitably the paint. layer was applied to one (if the paper surfaces, but it also could be applied to the soft or elastic bed or to the relief block. j

In an embodiment of the invention two papers or'the like are used and the paint was introduced between the said papers; after the pressure having been applied to the one paper both papers were separated.

The method is based upon the fact on applying the pressure the paint will be attentuated in those places that come into contact with the raised parts of the block orelectrotype and pressed against the ad jacent parts.

When printing according to the method as described above between endless surfaces,

for instance two rotating rollers, it has been found to be impossible to obtain a good print, mainly for .the reasonthat the moist paint forms a smooth layer between the rollers, causing a sliding effect between the paint layer and one of the rollers. This will cause a detrimental effect upon the print The present invention has for its obJect to eliminate this inconvenience while pressing between two endless surfaces (for instance two rollers) by o1n1ng or pressn'ig together thetwo surfaces, between which. the paintlayer is located before the mainor printing pressure by means of the block or electrotype is applied to the paper. Hereby'the two parts, between wh1ch the pamt layer is located, will be definitely j olnted together and'fixed in their relatlve POSltlOIl,

' so that on applying the pressure they will not be displaced against each other.

other advantageis that the moist paint is that I not partially squeezed in one direction, when the paper is introduced between the two endless surfaces. I

In case the print is made between a roller,

serving as a relief block, and another soft ,with an elastic surface, I) a relief roller and 0 a paper unrolled from the roller d, on which paper a print, for instance a wallpaper print, is to be made. The moist paint can'be applied to that surface of the paper 0 which is turned against the roller'a by means of the paint roller 6, but thepaint may also be applied to the roller a by means of a paint Y roller f. Of course other suitable devices could be used for applying the paint between 0 and a.

Suitably the paper is pressed against theroller .a by means of rollers so that the paint is spread in the direction of the arrow i, whereby it is avoided that such a spreading is effected between therollers a and 5, resulting in the smearing of the print. Hereby the result is obtained that the very high pressure between said two rollers a and 6 effects a uniform attenuation in all directions.

Besides this advantage another one is obtained, namely that no sliding or displace- '-ment effect can take place between the two used,rhavin an even or curved surface and being movale up and down or having a re- .c1 rocating motlon. It is, however, also pos si le to use instead of one or both rollers, endless bands or the like of leather, caoutchouc steel or'the like. 1

h is apressing strip, projectin into the space between the two rollers an pressing the paper 0 against the roller a just before it is introduced and pressed between the two rollers a and b. I p

Claims. 1. A process for making prints consisting counter-surface of any other shape could be placing sai paint to a sheet of material, sheet in contact with a roller with the painted side thereagainst; applying preliminary pressure progressively over said sheet to consolidate the paint, and finally pressing a printing element against said paper.

2. A process for making prints consisting in applyin paint to a sheet of material, placing said s eet in contact with a roller of applyingi having an elastic surface with the painted side thereagainst; applying preliminary pressure progressively over said sheet to consolidate the paint, and finally pressing a printing roller against said paper.

3. A process for making prints consisting in applying paint to a sheet of material, placing said sheet in contactwith a roller with the painted side thereagainst; applying preliminary pressure progressively over said sheet to consolidate the paint, and finally pressing a printing element against the unpainted side of said sheet.

In testimony whereof I aflix my signature in presence of two witnesses.

OSCAR RICHARD PETRELIUS,

- Witnesses:

GRETA PRIM, FRANK LYON. 

